package storm.trident.operation;

import storm.trident.tuple.TridentTuple;
import storm.trident.tuple.TridentTupleView.ProjectionFactory;
import backtype.storm.metric.api.*;
import backtype.storm.task.IMetricsContext;
import backtype.storm.task.TopologyContext;
import backtype.storm.tuple.Fields;


public class TridentOperationContext implements IMetricsContext {
    TridentTuple.Factory _factory;
    TopologyContext _topoContext;


    public TridentOperationContext(TopologyContext topoContext, TridentTuple.Factory factory) {
        _factory = factory;
        _topoContext = topoContext;
    }


    public TridentOperationContext(TridentOperationContext parent, TridentTuple.Factory factory) {
        this(parent._topoContext, factory);
    }


    public ProjectionFactory makeProjectionFactory(Fields fields) {
        return new ProjectionFactory(_factory, fields);
    }


    public int numPartitions() {
        return _topoContext.getComponentTasks(_topoContext.getThisComponentId()).size();
    }


    public int getPartitionIndex() {
        return _topoContext.getThisTaskIndex();
    }


    public <T extends IMetric> T registerMetric(String name, T metric, int timeBucketSizeInSecs) {
        return _topoContext.registerMetric(name, metric, timeBucketSizeInSecs);
    }


    public ReducedMetric registerMetric(String name, IReducer reducer, int timeBucketSizeInSecs) {
        return _topoContext.registerMetric(name, new ReducedMetric(reducer), timeBucketSizeInSecs);
    }


    public CombinedMetric registerMetric(String name, ICombiner combiner, int timeBucketSizeInSecs) {
        return _topoContext.registerMetric(name, new CombinedMetric(combiner), timeBucketSizeInSecs);
    }
}
